An Integrity Sensor for assessing the performance of low pressure membrane modules in the water industry

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• 作者：William B. Krantz ;   ; ^a ;   ; ^{krantz@colorado.edu} ; Corliss S. Lin^a ; Priscilla Ching Yee Sin^a ; Adrian Yeo^a ; Anthony G. Fane^a
• 关键词：Low pressure membranes ; Membrane integrity monitoring ; Microfiltration ; Ultrafiltration ; Pre-filtration
• 刊名：Desalination
• 出版年：2011
• 出版时间：1 December 2011
• 年：2011
• 卷：283
• 期：Complete
• 页码：117-122
• 全文大小：671 K

文摘

There is a need for a low cost, sensitive, on-line sensor to assess the integrity of membrane modules used in the water industry for water treatment, membrane bioreactors and for pre-treatment prior to using nanofiltration or reverse osmosis. A sensor addressing this need is described whose operating principle is based on measuring the differential pressure across a membrane that intercepts a portion of the permeate from the pre-treatment module(s) relative to the differential pressure across a valve. The latter can be adjusted to maximize the sensitivity of the instrument. A dimensionless metric based on the differential pressures is defined and corroborated with the Silt Density Index. The sensitivity of this Integrity Sensor is demonstrated by its response to cutting one fiber in a UF pre-treatment module that contains 1500 hollow fibers.